Date Stamp/Pagination in OmniGraffle 4

[Black, Matt]

Now that we are beyond NDAs and squelched conversations about the new
possibilities in OG4 (hooray!), can anyone tell me how to make page
numbering for each canvas from a master page item, akin to the old
"Command-3" master page functionality in Quark?

Also, does anyone have a clean script for making a date stamp?

Any help would be appreciated.